The height (h) of a fireball launched from a Roman candle with an initial velocity of 64 feet per second is given by the equation h (t) = - 16t^2 + 64t, where t is time in seconds after launch. Use the graph of this function to answer the questions. Estimate the time when the fireball is at its maximum height.
A. 2.3 seconds
B. 2 seconds
C. 0 seconds
D. 4 seconds
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